Help!very Powerful Amp Needed!

hernanstafe · 13th March 2007, 06:12 PM

I am building a subwoofer and i used a tda2050 parallel circuit to move it, and it comes out to be that it barely moves the speaker (which is 10" and about 200RMS). I need a really powerful amp, any suggestions?

I forgot, if possible it should work with +-70v or more, and it'd be nice if it had the pcb, cause i've tried to design some amp pcb with Protel and they didn't work out

Spirtos · 13th March 2007, 06:43 PM

Hi,
look at: http://sound.westhost.com/projects-1.htm

or even : Power amp under development for quasi's design.

hernanstafe · 13th March 2007, 10:28 PM

the sound westhost one is nice, but there's no PCB. Does anyone have the pcb for those? cause like i said i tried doing pcb's with protel but they didn't come out right

Plus the pcb has to be single sided!!

KISS · 14th March 2007, 03:36 AM

Budget? Have you thought about Class D? What's so freightning about double sided? Before computers, you used to "tape" layouts.
That was rough. A 6" x 6" board would be layed out on a 2' x 3' layers of velllum magnified. Fun. <G>.

BobEllis · 14th March 2007, 10:17 AM

I'm curious why you think that you need to see the speaker move. If the room is small (as I suspect it is since you are using a 10" sub) you won't see a lot of movement at reasonable volumes. Does the sub seem like it keeps up with your mains?

Are you using the driver in a ported enclosure? That will keep excursion down.

Before going to a new amp, be sure that you are getting a good signal to your driver - stick a voltmeter across it and see what you get when you are trying to be loud. You may find that your receiver settings are not sending much signal to the sub.

fotios · 14th March 2007, 11:58 PM

Quote:

Originally posted by hernanstafe
I am building a subwoofer and i used a tda2050 parallel circuit to move it, and it comes out to be that it barely moves the speaker (which is 10" and about 200RMS). I need a really powerful amp, any suggestions?

I forgot, if possible it should work with +-70v or more, and it'd be nice if it had the pcb, cause i've tried to design some amp pcb with Protel and they didn't work out

Take a look in A powerFULL amplifier named Dirty Harry This one is enough? With slight modifications the power output could be decreased from 300Wrms/8Ù to 200Wrms/8Ù. You need help? In your service always.
Fotios

fotios · 15th March 2007, 12:32 AM

Quote:

Originally posted by fotios

Take a look in A powerFULL amplifier named Dirty Harry This one is enough? With slight modifications the power output could be decreased from 300Wrms/8Ù to 200Wrms/8Ù. You need help? In your service always.
Fotios

O.K. i tell jokes. In this construction included two clean 170Wrms/8Ù channels with +/-60V supply. Are you in posetion to construct the one? It is very good and operate for two years without problems. Inform me to proceed in publishing of whole plans (schematic, layout, protections etc)

mjraudio · 15th March 2007, 12:59 AM

Normally, subwoofers are ported, but there are sealed versions such as Bob Carver's units.

Will your sub be ported or unported?

Sealed units with passive radiators can be particularly effective!

Anyways, to answer your question regarding an amplifier, I would recommend THIS unit. It has plenty of power to driver a 10" driver and I argue that you cannot find a better deal.

Leolabs · 15th March 2007, 01:30 AM

Try UcD kitsets too.

13th March 2007, 06:12 PM	#1
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	Help!very Powerful Amp Needed! I am building a subwoofer and i used a tda2050 parallel circuit to move it, and it comes out to be that it barely moves the speaker (which is 10" and about 200RMS). I need a really powerful amp, any suggestions? I forgot, if possible it should work with +-70v or more, and it'd be nice if it had the pcb, cause i've tried to design some amp pcb with Protel and they didn't work out

13th March 2007, 06:43 PM	#2
Spirtos diyAudio Member Join Date: Apr 2005 Location: Athens, HELLAS	Hi, look at: http://sound.westhost.com/projects-1.htm or even : Power amp under development for quasi's design. __________________ Where there is a "will" , there is a way! I hope...

15th March 2007, 12:59 AM	#8
mjraudio diyAudio Member Join Date: Jan 2007 Location: USA	Normally, subwoofers are ported, but there are sealed versions such as Bob Carver's units. Will your sub be ported or unported? Sealed units with passive radiators can be particularly effective! Anyways, to answer your question regarding an amplifier, I would recommend THIS unit. It has plenty of power to driver a 10" driver and I argue that you cannot find a better deal. __________________ --MJR MJR AUDIO My System

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13th March 2007, 10:28 PM	#3
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	the sound westhost one is nice, but there's no PCB. Does anyone have the pcb for those? cause like i said i tried doing pcb's with protel but they didn't come out right Plus the pcb has to be single sided!!

14th March 2007, 03:36 AM	#4
KISS diyAudio Member Join Date: Jan 2007	Budget? Have you thought about Class D? What's so freightning about double sided? Before computers, you used to "tape" layouts. That was rough. A 6" x 6" board would be layed out on a 2' x 3' layers of velllum magnified. Fun. <G>.

14th March 2007, 10:17 AM	#5
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	I'm curious why you think that you need to see the speaker move. If the room is small (as I suspect it is since you are using a 10" sub) you won't see a lot of movement at reasonable volumes. Does the sub seem like it keeps up with your mains? Are you using the driver in a ported enclosure? That will keep excursion down. Before going to a new amp, be sure that you are getting a good signal to your driver - stick a voltmeter across it and see what you get when you are trying to be loud. You may find that your receiver settings are not sending much signal to the sub.

15th March 2007, 01:30 AM	#9
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Try UcD kitsets too.

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